The 30-year-old royal, who had previously admitted of being huge fan of fantasy sex and violence-filled drama, had plenty of opportunities to accept the role, but he still has to make up his mind, the Daily Star reported.

The insider added that though there were lot of A-listers lined up for cameo, the creators DB Weiss and David Benioff desperately want Harry, who's now fifth in line to the throne after princess Charlotte's birth, as his appearance would be TV gold.

The George R.R Martin's novel based show is the most popular drama series, with almost 20million viewers in the US alone.

The filming for the sixth season will begin in Northern Ireland this summer.